Vertical movements identified within the landslide area over three
successive (~10 year) periods are presented in Figs. 4 and 5A and B.
Areas experiencing removal of materials are indicated by depressions,
while areas receiving material are indicated by peaks in these
difference images. Caution should be taken when assessing areas
exhibiting no changes, because these are not necessarily inactive
regions. Instead they can represent areas where the input of material
was equal to its output.